ບັດໄດໂນ ເລກທີ 1487 ຈາກ 2 027

Protognathus

ຊື່ໝາຍຄວາມວ່າ: “early jaw lizard”1

ກິນ: ພືດໄດໂນຄໍຍາວຈູຣາສຊິກຕອນກາງ ຫາ ຈູຣາສຊິກຕອນປາຍ

Protognathosaurus was a big, long-necked plant eater that lived in China during the Middle Jurassic. It is known from just a piece of its lower jaw, so scientists are still figuring out exactly what it looked like.1

ມີຊີວິດຢູ່

171 ຫາ 155 ລ້ານປີກ່ອນ3

ຈູຣາສຊິກຕອນກາງ ຫາ ຈູຣາສຊິກຕອນປາຍ

ຄວາມໄວສູງສຸດ

ປະມານ 15 ກມ/ຊມ (9 ໄມລ໌/ຊມ)

ແລ່ນ, ຄ່າປະມານ

ມັນມີຊີວິດຢູ່ເມື່ອໃດ?

ໄທຣແອສຊິກ

ຈູຣາສຊິກ

ຄຣີເທເຊຍສ

252 ລ້ານປີກ່ອນ20114566, ດາວເຄາະນ້ອຍຕົກ

ມັນໄວປານໃດ?

ຄົນຍ່າງ ປະມານ 5 ກມ/ຊມ (3 mph)

ເດັກຂີ່ລົດຖີບ ປະມານ 12 ກມ/ຊມ (7 mph)

Protognathus ປະມານ 15 ກມ/ຊມ (9 mph)

ມ້າກຳລັງຄວບ ປະມານ 65 ກມ/ຊມ (40 mph)

ເສືອຊີຕາ ປະມານ 100 ກມ/ຊມ (62 mph)

ເລື່ອງເທ່ໆ

ເລື່ອງໜ້າຮູ້ມ່ວນໆ

Protognathosaurus is known only from a single piece of lower jaw, called a dentary, which had about 18 tooth positions.1

Its name was first Protognathus, but that name was already used for a beetle, so in 1991 it was changed to Protognathosaurus.1

The jaw shows sharp replacement teeth still growing in, which is why the species name oxyodon means 'sharp tooth'.1

It lived about 168 to 161 million years ago, during the Middle Jurassic.1

The fossil was found in the Lower Shaximiao Formation, which is made of sandstone and mudstone from an ancient lake.2

Scientists think it was a medium-sized primitive sauropod, with a thick and heavy lower jaw.2

ຮູບ Protognathus ທີ່ AI ສ້າງ — ຮູບທີ່ AI ສ້າງ ສະແດງວ່າ Protognathus ອາດຈະມີໜ້າຕາແນວໃດ, ຄອມພິວເຕີສ້າງຂຶ້ນຈາກສິ່ງທີ່ນັກວິທະຍາສາດຮູ້. ມັນເປັນການຄາດເດົາ: ສັດໂຕແທ້ອາດຈະມີໜ້າຕາຕ່າງອອກໄປ, ແລະ ບໍ່ມີໃຜຮູ້ສີແທ້ຂອງມັນ.

ໄຂຄວາມເຊື່ອຜິດ

ຄວາມເຊື່ອຜິດ: Some people think Protognathosaurus is a fake or made-up dinosaur because it is so incomplete.

ຄວາມຈິງ: It is a real dinosaur, but many scientists consider it a nomen dubium, meaning the name is doubtful because the fossil is too fragmentary to be sure.1

ສຳລັບຜູ້ຊ່ຽວຊານໄດໂນ

ຊື່ວິທະຍາສາດ: Protognathus
ຕັ້ງຊື່ໂດຍ: Zhang 19883
ກຸ່ມ: ໄດໂນຄໍຍາວ
ຄອບຄົວ / ເຄລດ: Cetiosauridae3
ການຈັດໝວດໝູ່: Sauropodomorpha > Sauropoda3
ອາຍຸຂອງຫີນ: 171 ຫາ 155 ລ້ານປີ (Bajocian / Oxfordian)3
ບັນທຶກຟອສຊິລ: 1 ໃນ The Paleobiology Database3
ການຄົ້ນພົບ: In 1988, Zhang Yihun named and described the type species Protognathus oxyodon from a jaw found in China. In 1991, George Olshevsky renamed it Protognathosaurus because the old name was already taken.1
ຍັງຖົກຖຽງກັນຢູ່: Scientists debate whether Protognathosaurus is a valid genus or just a nomen dubium, because the only fossil is a piece of jaw.1

ຂໍ້ມູນມາຈາກໃສ

Protognathosaurus (en.wikipedia.org)
PBDB Taxon (paleobiodb.org)
Protognathus in The Paleobiology Database (CC BY 4.0): ອາຍຸ, ສະຖານທີ່, ຊັ້ນຫີນ, ການຈັດໝວດໝູ່.

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